Never did I image when I was playing the flash game Desktop Tower Defense back in High School that the genre would explode into the global gaming phenomenon that it has become. Yes, it is true that you can pretty much find this style of game on virtually every platform imaginable, but rarely are they available on the iPad for absolutely free.

TapDefenseHD is a newly released iPad exclusive that tasks you with guarding the Pearly Gates from a hellish invasion of the very worst variety. Featuring forty two stages of demonic battling fun, lets hope that you are not a Satanist - otherwise, things could be awkward. Religious subtexts aside, when you are paying nothing for a game, there is really no reason not to give it a shot.

Now the real question becomes what are the developer TapJoy's motivations for releasing this game for free? Lets just hope they are as pure as the subject matter. Give it a download and hit us up with a mini-review in the comments.